Reamer



May 29, 1923.

C. A. KELL REAMER Filed June 29 1921 2 Sheets-Sheet 1 jn-vcrh $1 wi zgm rezi d'lntucla Patented May 29, 1923.

r CHARLES a.

KELL,.0F ELKHART, INDIANA. ii f REAMER'.

A pplic ati onfiled J ne '29, .1921. Serial K54 113 02,

To (ZZZ whom ifmdy cohcerm I Be it known that 1,,CnARLnS/A. Kenn, a

citizen of the United States, residin at Elkhart, in the county of Elkhartand gtate of Indiana, have inventednew'and useful Improvements in Reamers, lot which the following isva specification. v This invention relates to boring or drilling tools, and particularly to reamers, hav- 1 ing for its primary object to provide a tool of. such construction as to obviate chatteringwhen in use; i' f I A further cobjec'tflof theinvention is to provide a reamerfwhereinmeans of an iniproved'nature is employed for enabling the cut-ting blades thereoftobe adjusted 1a; 'dially of thereamer, whereby the cutting diameter of the tool. may beincreased or diminishedas desired. r I

A still further object of. the inventionis to provide ,a'reamer of the character stated having improved means for, creating the adjustments as stated, and wherein the cutting'blade's are at all times held '2 I predetermined vdegree of pressure A still further object ofrthe in'vention is to provide-a reamerof the character specijfied which is ofvsimple construction, which employs comparatively few simple and readily assembledpartts, which has its parts so-constructed and assembled as to minimize the opportunity for wear, breakage orderangement, which may be quickly and easily adjusted to obtain the. desired cut ,and which will prove thoroughly practical and eflicient 1nyuse.- WViththese andothereobjects in view, the invention consists I of the features of .construction, combination and arrangementof parts, hereinafter fully, described 7 and panying drawings, in w1ich:' Figurezl is a side elevatiomparts in section, of a. rreame-r embodying the invention, 'Figure 2 is-an elevation of the outer end of the reamer, r v

, Figure 3 is'a' similar view of the inner claimed,,referencebein had to the accomend of the reamer, i

Figure list-a sectional View of thecou- I I I '20 in the, side walls of the pling sleeve, I i I I Figure 5 is'a side elevationof the reamer head removed-fromtheshank,

of'the said'head, I

Figure 7 is an elevation of the spring I Figure 6 is'in elevation of the outer end' I shank. un e 31114, the inner endiof thehead snugly fitplicable I to recesses E 15,

used to exert pressure; @5 1 the "blade holders- Figur e sis alface view ofthe blade holders,

Figure 9 is a side elevation of one of the blade holders, and I Figure l0is the. blade holders. I a Referring now more particularly to; theend elevation of one. of

drawings, vll indicates shank of the rea ner, the latter being c irc ular 'in cross sectlon and of one diametenthroughout a parto-i its length, having threads'12 upon its exterior for a substantialportio-n ofits length, and being squared as at l3atitsjinner end to: enablethe'same to be .ap'plied'to a machine. This shank tapers toward its outer end as sh0wn,the walls offthetapered portions being, smooth andstraight .throughu out the. entire circumference of theqshank,

and the said tapered I portion extending nearly, to I the i outer extremityof thesaid v The shank" isenel'osti bye ad eased,

ting upon the straight portion of shank jll,

;while the outer portion of the said .hea'dfis increased in diameter and is. provided at regular spaced intervals throughout its' feir .cumference with spaced parallel recesses '01 openings .15 disposed longitudinally, of the head -Tlie recesses -l5 extend throughout substantially the entirelengthgof. the-enlarged port-ion of the; head 'l-aaind the end walls defining these recesses converge or inc'line inwardly toward the axis of thehead.

The blades "forthe' reamer are carried by holders indicated at,1 6, the latterbeingaphave their inner'or under faces cut at such angle that when resting upon the tapered surface of thezsharik their'outer faces will tool holders are vpro-videdwith angularrea and thes'eih'olders cesses or channels 18 to receive cutting blades 19, and screws 20 threaded through openings I holders engage the sides of the blades 19 and holdthe'latter firmly intheholders. I

The outer extremity .ofrhead 14, is reduced asat 21v and exteriorly' ithreaded as shown,

and a collar 22*passes loosely over 'theport'ion lltl thereo-Lthe said recess 'bein provided with an a "receives ribs 34 ezite'nding' inwardly from the sectional members 35 constituting a twopart bushing"(one of the linesof divisionbe- "tween'the bushing members being Figure l) ,said bushing being confined with- 'in flange threads 12 of shank 11. through the flange 36 engage in suitable openingsin sections 35 of thebushingpthus 21 and engages the outer ends of the holders 16. The outer portions of the holders 16 at their endsare beveled as at 23, and the inner face of collar 22 is similarly beveled so as to engage the portions 23 of the tool holder. A nut 24 is threaded upon the portion 21 of the head, and an annular compression spring 25 is confined between nut 24: and collar 22. This spring thus exerts pressure upon the lower or outer ends of the toolholders, tending to force the latter inwardly of the shank, and by reason of the coacting beveled faces of collar 22 and the lower ends "ofthe tool holders, the said holders are pressed downwardly into firm engagement with the tapered shank 11.

The head 14 is threaded asat 26 inwardly from its inner end andadj acent theenlarged portion thereof, and this threaded portion receives a nutQ/T 'to engage a'collar 28 loosely enclosing the threaded'portion and engag- "ing the adjacent ends of blade holders 16.

@[t will be observed that the adjacent edges of 'sleeve'28 and the'b'lade holder 16 are inclined so that the said collar will "tend to press inwardly upon the said holders to maintain the latter firmly seated upon the tapered wall of'shank 11.

The'head 14 is provided with an elongated recess 29 extending entirely through one wall thereof at the threaded portion 26 disposed longitudinally of the head, and this recess reor "socket 31 in the shank, and 'maintained rigidly in position byth'e screw '32. This "key locksthe shank and head a ainst relativerot'ary movement, 'but permits the said shank Z and head sliding longitudinally rela- "tive' to each other.

The inner end oftheannul'ar head 14 is nnulai' recess 33 which shown in 36 of sleeve 37 engaged upon Screws 38 passing holding the flange and bushing "together "properly assembled'upon head '14, and it is obvious from of sleeve 37 "'willcause the head 14 to be this construction that rotation moved longitudinally upon the shank 11, de-

pending upon the direction of rotation of the said sleeve.

v The shoulderat the juncturef'of the portion 36 with sleeve 37vmay'be 'provided'with gra'duations a shown at 39 as 'a' guide to the ad] ustment of the head and its blade holders.

In operating the reamer,"the sleeve 37 is "rotated in the proper direction to" causethe blade holders 16 'to be retracted orexpanded as desired. As the sleeve 37 is rotated, the rib 34: on annulus 35 willcause the head 1 1 to move longitudinally of the shank, but rotary movement of the said shank and head relative to each other is prevented by the key 30. As the head is retracted, the holders 16 riding upon the inclined plane provided by the tapered portion of shank 11 will move outwardly, and when the desired projection of the blades is obtained the nut 27 is turned so as to firmly bind collar 28 against the inner ends of the holders while nut 24: may be adjustedso as tobring about the desired pressure upon collar 22. Spring '25 exerts its pressure upon, this collar and holds the tool holders against moving or chattering, as the holders are bound firmly from the spirit of the invention as defined by the claims. ceives a locking key 30 seated in a depression "Having thus fully described'myinviention, 'I claim: 1 I

1. In a reamer, the combination of asha'nk having a tapered portion, an annular head enclosing and movable longitudinally upon said shank, said headfbein'g provided with longitudinal slots opening through its inner and outer faces, recessed 'blade holders mounted in said slots and ha'iring inwardly projecting extensions with inclined "surfaces resting upon the tapered surface of 'the shank, "blades held inthe recessed portions of the holders, means for moving the head longitudinally of the shank and fixing it in ad usted position,;'and means carried by the head for engaging the oppositeends of' 'the blade holders and fixing the same inadju'sts on," said head being'provided with'lqn itudinal and "radially extending 'slots havi'n'g inclined end walls, recessedblade holders 'mounted in said slots, said blade 'hol'ders having portions extending inwardly there from -and having 'innen inclinedsurfaces resting upon the tapered portion of the shank and inclined end portions engaging the end walls-of the slots, means f'o'r shifting the head longitudinally on the shank and fixing it in adjusted p'osition, collars 15 with said shank, and means for moving said loosely mounted upon the head and overhanging and engaging the ends of the blade holders, blades fitted in the blade holders, a nut upon the head engaging one of said col lars, a nut upon the head for cooperation with the other collar, and a pressure spring disposed between the latter-named nut and collar.

3. In a reamer, a tapered shank, a head enclosing and movable longitudinally upon said shank, the said head having longitudinal recesses therein, blade holders in said re cesses and resting upon said shank, means yieldably maintaining said holders engaged head. r I

4. In a reamer, a tapered shank, a head enclosing and movable longitudinally upon said shank, a blade holder carried by said head andresting upon said shank, the under ;face of said holderbeing inclined similarly to said shank, a collar atone end of sai'd head pressing inwardly upon said holder, a

spring engaging said collar, a nut on said head holding said spring, a collar near the opposite end ofsaid head holding the adjacent end of the blade'holder, a socket limiting the movement of said collar, and a sleeve threaded upon said shan'k and engaged with I said head, whereby the latter may be moved longitudinally of said shank.

In testimony whereof I af fix my signatura CHARLESVAY.KIEILL 

